Biology and control of swamp dodder (Cuscuta gronovii)

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6954453

Bewick, T A

A simple model predicting swamp dodder (Cuscuta gronovii Willd.) emergence was developed. The model states that 0.1% of the cranberry seedlings will emerge after 150 to 170 GDD have accumulated after the winter ice has melted on the cranberry beds, using 0 C as the low temperature threshold. Experiments in cranberry showed that pronamide (3,5-dichloro-(N-1,1-dimethyl-2-propynyl)benzamide) was effective in controlling swamp dodder when applied preemergence. Rates below 2.4 kg ai/ha appeared to be safe for cranberry plants and fruit. Experiments with /sup 14/C glyphosate showed that the herbicide moved out of carrot leaves to the physiological sinks in the plant. In carrots parasitized by swamp dodder the dodder acted as one of the strongest sinks for photosynthates from the host. In cranberry glyphosate moved out of the leaves, but most remained in the stem to which the treated leaves were attached. The only physiological sinks that accumulated significant amounts of label were the stem apices. The concentration of the herbicide in this sink decreased with time. Swamp dodder stems were able to absorb glyphosate directly from solution.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 6954453
• Country of Publication: United States
• Language: English

Related Subjects

553003* -- Agriculture & Food Technology-- Pest & Disease Control-- (1987-)
60 APPLIED LIFE SCIENCES
BERRIES
BIOLOGICAL EFFECTS
CARBON 14 COMPOUNDS
CARROTS
FOOD
FRUITS
GROWTH
HERBICIDES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
PARASITES
PESTICIDES
PHOSPHATES
PHOSPHORUS COMPOUNDS
PLANT GROWTH
PLANTS
TRACER TECHNIQUES
UPTAKE
VEGETABLES